An object is moving in the X-Y plane. At time t 1 the direction of its velocity,

Question

An object is moving in the X-Y plane. At time t1 the direction of its velocity, v and acceleration, a are:
Direction of v is in the negative Y direction
Direction of a is in the positive Y direction

increasing decreasing constant  At time t1, the magnitude of the velocity of the object is _______. Select increasing, decreasing or constant.

increasing

changing not changing  At time t1, the direction of the velocity of the object is _______. Select changing or not changing.

positive Y: At time t1, the direction of the net force acting on the object is _______. Select the coordinate direction of the net force.

Explanation / Answer

Part A) the magnitude of the velocity of the object is remains decreasing. as a is positive and v is in the negative Y direction i.e. acceleration is acting opposite to the velocity vector so magnitude of velocity decreases.

Part B) the direction of the velocity of the object is not changing.

Part C) At time t1, the direction of the net force acting on the object is in the positive Y direction i.e. in the direction of the acceleration.

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